Tool chỉnh sửa html css live, hổ trợ kết quả tức thì ở khung bên dưới, rất tiện lợi cho bạn cần chỉnh sửa chút ít về css

<script type="text/javascript">

var editboxHTML =
'<html class="expand close">' +
'<head>' +
'<style type="text/css">' +
'.expand { width: 100%; height: 100%; }' +
'.close { border: none; margin: 0px; padding: 0px; }' +
'html,body { overflow: hidden; }' +
'<\/style>' +
'<\/head>' +
'<body class="expand close" onload="document.f.ta.focus();;">' +
'<form class="expand close" name="f">' +
'<textarea class="expand close" style="background: #def;" name="ta" wrap="hard" spellcheck="false">' +
'<\/textarea>' +
'<\/form>' +
'<\/body>' +

var defaultStuff = '<h3>Welcome to the real-time HTML editor!<\/h3>\n' +
'<p>Type HTML in the textarea above, and it will magically appear in the frame below.<\/p>';

// I don't want this stuff to appear in the box at the top because I feel it's likely to be distracting.
var extraStuff = '<div style="position:absolute; margin:.3em; bottom:0em; right:0em;"><small>\n  Created by <a href="" target="_blank">Jesse Ruderman<\/a> and hosted by <a href="" target="_blank">DreamHost<\/a>.\n<\/small><\/div>';

var old = '';
function init()
  window.editbox.document.f.ta.value = defaultStuff;

function update()
  var textarea = window.editbox.document.f.ta;
  var d = dynamicframe.document;

  if (old != textarea.value) {
    old = textarea.value;;
    if (old.replace(/[\r\n]/g,'') == defaultStuff.replace(/[\r\n]/g,''))

  window.setTimeout(update, 150);

<frameset resizable="yes" rows="50%,*" onload="init();">
  <!-- about:blank confuses opera, so use javascript: URLs instead -->
  <frame name="editbox" src="javascript:'';">
  <frame name="dynamicframe" src="javascript:'';">

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